Общий каталог Widia 2017 - страница 1682

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General Application Hints

  • Identify your critical diameter (D).
  • Identify the maximum distance cutting edge (L) to critical diameter.

Here are some examples:

D

D

D

L L

Refer to this table for fi rst investigation of application:

Type of Tooling StableUnstableTests Necessary
Twin Cutter Solid Tools<3,5 x D3,5–6,5 x D>6,5 x D
Twin Cutter Bridge Tools<3,5 x D3,5–6,5 x D>6,5 x D
Fine-Boring Heads with Boring Bar (FBHBB)<3,5 x D3,5–5,0 x D>5,0 x D
Fine-Boring Heads (FBH)<3,5 x D3,5–5,0 x D>5,0 x D
Fine-Boring Bridge Tools<3,5 x D3,5–5,0 x D>5,0 x D

Function of the tool is Application may require Machining test may expected without issues reduced feeds and/or speeds be required to identify within recommended compared to stable conditions. cutting data. cutting data.

Causes of and remedies for rough and fi ne boring problems

It is generally assumed that the tools have been properly mounted as per the technical recommendations in this catalogue.

Problem Cause Possible Remedy

  • Adjust L/D ratio
  • Select 90° lead angle on rough boring tools

1. Overhang

  • Select inserts with positive geometry

Vibration tendency 2. Choice of insert

  • Select inserts with smaller corner radius

3. Cutting data

  • Reduce depth of cut
  • Increase feed
  • Select 90° lead angle

1. Choice of insert Select ground inserts with small edge preparation

Slight chatter marks on surface 2. Cutting data Select inserts with smaller corner radius

3. Machining environment Increase feed

  • Increase coolant

1. Choice of insert Conical bores 2. Cutting data 3. Machining environment

  • Select a more wear-resistant insert grade
  • Increase cutting speed
  • Check whether all screws have been tightened to recommended torque